Holding means for bobbin winders of sewing machines



March 1956 w. HANSEN 2,737,915

HOLDING MEANS FOR BOBBIN WINDERS OF SEWING MACHINES Filed Sept. 26, 1952 I N V EN TOR. Mmzw #QA SEN BY fizimfw A75 HTJOlP/VEY United States Patent HOLDING MEANS FOR BOBBIN WINDERS OF SEWING MACHINES Warren Hansen, East Moline, Ill., assignor to Gellman Manufacturing Co., Rock Island, 11]., a corporation of Illinois Application September 26, 1952, Serial No. 311,748

4 Claims. (Cl. 112-218) This invention relates to certain new and useful improvements in holding means for bobbin winders of sewing machines especially, though not necessarily, of the domestic type.

The invention has for its principal object the provision of a simple, effective and inexpensive arrangement for holding the bobbin winding wheel or roller in engagement with the flywheel of the sewing machine and for latching the bobbin winding wheel in a position from engagement with such flywheel.

Another object of the invention is to provide a device of the character hereinafter more fully described which can be associated with a sewing machine with the minimum degree of labor and cost.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will best be understood by reference to the accompanying drawings showing the preferred form of construction, and in which:

Fig. l is a fragmentary end view of a sewing machine showing my invention associated therewith;

Fig. 2 is a fragmentary end view similar to Fig. 1, showing the bobbin winder wheel in engagement with the flywheel of such machine; and

Fig. 3 is a fragmentary front view taken substantially on line 3-3 of Fig. 1.

For purposes of better illustration the several parts of the sewing machine illustrated in the drawings are exaggerated in size. The conventional sewing machine comprises a base plate on which is mounted a standard 11. This standard 11 carries a flywheel 12 operated in a manner well known in the art and which flywheel is utilized for rotating a bobbin supporting stud shaft or stud screw.

This stud shaft is indicated at 13, and it is the usual practice to mount the bobbin on this shaft to facilitate winding the thread on the bobbin. This shaft 13 carries a roller or wheel 14. The shaft 13 and wheel 14 are supported at the outer end of an arm 15 pivoted to the standard 11 by means of a pivot screw 16. The arm 15 in the present instance provides at its end opposite that carrying the stud shaft 13, a longitudinally extending finger 17.

On the standard 11, preferably above the pivot screw 16, is a pin 18. Coiled about this pin 18 is a coil 19 formed intermediate the end portions of a spring wire length 20. The ends of this wire length 20 from the coil 19 cross each other at the point 21 to provide a bias to bear one end portion 22 of the wire against a boss portion 23 provided by the standard 11 and to bear the opposite end portion 24 against the finger 17.

Approximately midway between the coil 19 and the opposite end portion of the wire length, 24, an offset is formed in the wire length to provide a stop shoulder 25. When the arm 15 is in the position shown in Fig. 1, the finger 17 will be disposed in yieldable contact with the stop 25, and due to the biasing effect of the end portion 24 against this finger 17, the arm 15 will be yieldably held in the position shown in Fig. 1. When, however, the arm 15 is pivoted to the position shown in Fig. 2, with the wheel or roller 14 engaging the flywheel 12, the end portion 24 of the wire length will yieldably bear against the finger 17 and thereby maintain the arm 15 in the position shown in Fig. 2, with the Wheel 14 in engagement with the flywheel 12. When the wheel 14 is in such position, the bobbin shaft 13 will be rotated for winding thread upon the bobbin.

From the foregoing description, it will be apparent that I have provided a simple, yet effective, means for maintaining the bobbin shaft supporting arm 15 and the wheel 14 thereon in either operative or inoperative position. The arrangement is such that the pivoting of the wheel 14 from and into engagement with the flywheel 12 is in no way interfered with and requires no undue exertion upon the part of the operator.

The construction is such as permits easy and inexpensive assembling. In case of necessity of replacement, the spring wire may be very easily removed and replaced;

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In combination with a sewing machine having a standard carrying a bobbin winder comprising a pivotally supported arm having at one end a bobbin driving wheel, a latching finger extending longitudinally from the opposite end of said arm, a supporting pin carried by said standard of said sewing machine, a member having a coil embracing said pin and having end portions crossing each other at a point adjacent said pin with one of said portions biased against a portion of said standard and the other of said end portions of said member formed to provide a stop yieldably engaging said finger of said arm.

2. In combination with a sewing machine having a standard carrying a bobbin winder comprising a pivotally supported arm having at one end a bobbin driving wheel, a latching finger extending longitudinally from the opposite end of said arm, a supporting pin carried by said standard of said sewing machine, a member having a coil embracing said pin and having end portions crossing each other at a point adjacent said pin with one of said portions biased against a portion of said standard and the other of said end portions of said member formed to provide a stop yieldably engaging said finger of said arm, said other of said end portions of said member having an outer end portion biased against said finger of said arm when said finger is moved from engagement with said stop.

3. In combination with a sewing machine having a standard carrying a bobbin winder comprising a pivotally supported arm having at one end a bobbin driving wheel, a latching finger extending longitudinally from the opposite end of said arm, a supporting pin carried by said standard of said sewing machine, a member comprising a single length of spring wire having a coil embracing said pin and having end portions crossing each other at a point adjacent said pin with one of said end portions biased against a portion of said standard and the other of said end portions of said member formed to provide a stop yieldably engaging said finger of said arm.

4. In combination with a sewing machine having a standard carrying a bobbin winder comprising a pivotally 3 4 supported arm having at one end a bobbin driving Wheel, said coil and said last mentioned end for yieldably ena holding means for said bobbin winder comprising a gaging said finger of said arm. latching finger extending longitudinally from the opposite end of said arm, a supporting pin carried by the standard References Cited in the file of this Patent of said sewing machine, a member having a coil embrac- 5 UNITED STATES PATENTS ing said pin and having its end portions crossing each other at a point adjacent and between said pin and said 1 et ar Witn one of the end portlons biased against a por- 118481352 Kelso Mar. 1932 tion of the standard and the other of said end portions of said member bent to provide a stop shoulder intermediate 10 

